The M4F project brings together the fusion and fission materials communities working on the prediction of radiation damage production and evolution and their effects on the mechanical behaviour of irradiated ferritic/martensitic (F/M) steels. It is a multidisciplinary project in which several different experimental and computational materials science tools are integrated to understand and model the complex phenomena associated with the formation and evolution of irradiation induced defects and their effects on the macroscopic behaviour of the target materials. In particular the project focuses on two specific aspects: (1) To develop physical understanding and predictive models of the origin and consequences of localised deformation under irradiation in F/M steels; (2) To develop good practices and possibly advance towards the definition of protocols for the use of ion irradiation as a tool to evaluate radiation effects on materials. Nineteen modelling codes across different scales are being used and developed and an experimental validation programme based on the examination of materials irradiated with neutrons and ions is being carried out. The project enters now its 4th year and is close to delivering high-quality results. This paper overviews the work performed so far within the project, highlighting its impact for fission and fusion materials science.

M4F 项目汇集了聚变和裂变材料社区，致力于预测辐射损伤的产生和演变及其对辐照铁素体/马氏体 (F/M) 钢的机械性能的影响。它是一个多学科项目，其中集成了几种不同的实验和计算材料科学工具，以了解和模拟与辐射诱导缺陷的形成和演变相关的复杂现象及其对目标材料宏观行为的影响。该项目特别关注两个特定方面： (1) 开发 F/M 钢辐照下局部变形的起源和后果的物理理解和预测模型；(2) 制定良好做法并可能推进使用离子辐射作为评估材料辐射影响的工具的协议定义。正在使用和开发 19 种不同规模的建模代码，并且正在执行一项基于对中子和离子辐照材料的检查的实验验证程序。该项目现已进入第四个年头，即将交付高质量的成果。本文概述了该项目迄今为止所做的工作，重点介绍了其对裂变和聚变材料科学的影响。正在使用和开发 19 种不同规模的建模代码，并且正在执行一项基于对中子和离子辐照材料的检查的实验验证程序。该项目现已进入第四个年头，即将交付高质量的成果。本文概述了该项目迄今为止所做的工作，重点介绍了其对裂变和聚变材料科学的影响。正在使用和开发 19 种不同规模的建模代码，并且正在执行基于对中子和离子辐照材料的检查的实验验证程序。该项目现已进入第四个年头，即将交付高质量的成果。本文概述了该项目迄今为止所做的工作，重点介绍了其对裂变和聚变材料科学的影响。